/Engine/Plugins/Runtime/MeshModelingToolset/Source/ModelingComponents/Public/Drawing/PreviewGeometryActor.h
Triangle Set Utilities Find the identified triangle set and call UpdateFuncType(UTriangleSetComponent*)
template<typename UpdateFuncType> void UpdateTriangleSet ( const [FString](API\Runtime\Core\Containers\FString) & TriangleSetIdentifier, UpdateFuncType UpdateFunc )